Quarrying-toql



(No Model.) 2 Sheets-Sheet 1.

J. M. GROUCH.

QUARRYING T001.. f

No. 512.605. .Patented Jan. 9, 1894.

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2 Sheets-Sheet 2. OUCH.

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Patented Jan. 9, 1894.

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JAMEs M. cRoucH, or BUCKEYE CITY, oHio.

QUARRYlNG-TOOL'.

SPECIFICATION forming part of Letters Patent No. 512,605, dated January9, 1894.

lvpplication iiled February 21, 1893. Serial No. 463 ,149. (No model.)

improvements in 'the fracture occasioned by blasting.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings and pointed out in the claims hereto appended.

In the drawings-.Figure l is a side elevationof a tool constructed inaccordance with this invention. Fig. 2 is a longitudinal sectional view.Fig. 3 is a detail perspective view of one of the longitudinalchisel-cutters. Fig. 4 is a horizontal sectional view on line .fr-ac ofFig. 1. Fig. 5 is adetail view of one of the chisel-cutter securingplates. Fig. 6 is a similar view of the handle. Fig. 7 is a detail viewof the wedge-bar.

Like numerals of reference indicate corresponding part-s in all thefigures of the drawings.

1 designates atubular body, provided at opposite sides with longitudinalslots 2 and having its lower end'3 closed, and receiving within it apair of longitudinal chisel-cutters 4., arranged at the slots and.adapted to be expanded to project through the slots beyond the body toform a straightline of indentations at opposite sides of a holeto directthe fracture in blasting. Each chiselcutter is provided with a series ofpyramidal teeth 5, narrower than and adapted to project through theslot; and the chisel-cutter is T-shaped in cross-section to provide ateach of its sides a longitudinal shoulder 6 to limit the outwardmovement or expansion and thereby expand the chisel-cutter only thedesired distance. Each end of the chisel-cutter is provided with arecess 7, which is engaged by a projection 8 of a plate 9, which issecured to the body of the tool at each end of the slot; and thisconstruction connects the chisel-cutter loosely to the body and retainsit in proper position for expansion. 'The plate is secured by screws 10,or other fastening devices, and is provided with threaded openings toreceive the screws, which have their heads arranged in countervsunkopenings of the body 1. The expansion or outward movement of thechisel-cutters is produced by a bar 11 having a wedge-shaped lower end12. Other means may be employed for expanding the chiselcutters, but thewedge-shaped bar is the most desirable as blows of the necessary forcemay be readily given to the bar for,driving the teeth of thechisel-cutters into the rock or stone.

j The body is provided with an adjustable collar 13, which has a setscrew 14 for securing it in its adjustment, and which is adapted tosuspend the tool in a hole to make the lines of indentations to thedesired depth.

The tool also has a handle 15 having parallel ends 16 and a connectingportion 17, which is provided with -a semi-cylindrical bend and to whichris secured a clamping section 18 by bolts 19. The clamping section isprovided with a bend similar to that of the cross-piece or connectingportion 17, and the body 1 of the tool is clamped between the bends.

The upper portion of the body is provided with indicator lines 2Oextending from the upper ends of the slots to the top of the body, toenable the operator to tell at a glance the position of thechisel-cutters when the body is inserted in a hole.

It will be seen that the tool is simple and comparatively inexpensivelin construction, and that a line of indentations maybe readily made inopposite sides of a hole to direct the fracture in blasting.

Changes in the form, proportion andthe minor details of constructionmaybe resorted to without departing from the principle or sacriticinganyof the advantages of thisinvention.

1. A quarrying tool comprising a body pro= vided at opposite sides withlongitudinal slots, chisel cutters arranged in the body and securedagainst longitudinal movement and capable of being projected outwardthrough the. slots and provided with teeth for forming a series ofindentations, means for forcing the IOO chisel-cutters outward, and anadjustable collar mounted on the body and adapted to rest upon the rock01' stone to be blasted adjacent to the hole for supporting the chiselcutters at the desired elevation, substantially as and for the purposedescribed.

2. In a quarrying tool, the combination of a tubular body provided atopposite sides with longitudinal slots, toothed chisel-cutters arrangedin the body and provided at theirl backs with opposite longitudinalshoulders of greater width than the slots to limit the ontward expansionof the chisel cutters, and means-for expanding the chisel-cutters,substantially as described.

3. In a quarrying tool, the combination of a tubular body provided atopposite sides with longitudinal slots, the toothed chiselcuttersprovided at each end with a recess, plates secured to the body at theends of the slots and provided with projections loosely engaging therecesses, and means for expanding the chisel-cutters, substantially asdescribed.

4. A quarrying tool comprisingabody provided at opposite sides withlongitudinal slots,

chisel cutters provided at their outer sides with teeth mounted in thebody and secured against longitudinal movement and capable of outwardmovement through the slots, and means for forcing the chisel cuttersoutward for forming a series of indontations, substantially asdescribed.

5. A quarrying tool comprising a body provided at opposite sides withlongitudinal slots, chisel cutters provided at their outer sides withteeth and mounted in the body and secured against longitudinal movementand capable of outward movement th rough the slots, and a longitudinallymovable Wedge intel'- posed between the chisel cutters for forcing thelatter outward, whereby a line of indentations is formed at oppositesides of the hole, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

JAMES M. CROUCI'I.

Witnesses:

LEVI T. BATES, CHARLES STEPHENS.

